Local SAR Constrained Parallel Transmission RF Pulse in Magnetic Resonance Imaging
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United States of America Patent
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Issued Date -
Mar 14, 2013
app pub date -
Aug 31, 2012
filing date -
Sep 1, 2011
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Abandoned
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Abstract
A method of designing a parallel transmission radio frequency (RF) pulse for a magnetic resonance imaging (MRI) system includes compressing a model for a subject to be scanned by the MRI system into a plurality of virtual observation points within the model based on comparisons of peak sensitivity to local specific absorption rate (SAR), and defining the parallel transmission RF pulse that minimizes a weighted average of local SAR values with an iterative procedure that optimizes a set of weighting factors for the plurality of virtual observation points to maximize the minimized weighted average.
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